philipmathew, at this point I'd suggest you to enter the coding for the brakes that are of the closest size to yours (288 front and 232 rear).
Since you are driving a FWD car, I guess it is more important to have correct coding for the front brakes than for the rear ones.
Plus to this, consider that some brakes codings can be accepted by the ABS Unit only if you also modify the specific bytes of Engine and Transmission.
After many tries on different Polo 6R and Audi A1, I understood these ABS Units (8.2i and 9.0i) are programmed to accept only specific combinations of engine/transmission/brakes codings.
For example: if in the Unit has been programmed that your engine/transmission combination can only have "256mm front-drum rear" and "256mm front-232 rear", the Unit will never accept any other brakes coding!
You also need to change Engine/Transmission bytes with others that the Unit is programmed for having other brakes codings.
In less words, you need to trick the ABS Unit, making it see like you have another Engine/Transmission combination, to unlock the brakes coding you need.
So, it's not a matter of firmware version as someone keeps to say!
Let's make another example!
The ABS Unit 8.2i can accept coding only for:
256mm front - drums rear;
256mm front - 232mm rear;
288mm front - 232mm rear.
But only the 6R GTI and 1.6TDI 105cv have the last brakes setup from favtory.
So the 8.2i Unit has been programmed to accept the last brakes codings only with 6R GTI and TDI Engine/Transmission bytes combination.
If you try to enter the last brakes coding with (for ex.) 1.2MPI or 1.2TSI Engine/Transmission bytes, the Unit will never accept the coding, because it has not been programmed for that combination (literally: "request out of range").
But if you also change the Engine/Transmission bytes with those of 6R GTI or TDI...
voilà! "Coding Accepted!"